Shedinja
Endure and Confuse Ray is useless. Give it X-Scissor because it can be another STAB if shadow sneak is unaffective. Confuse Ray is outclassed by Will-O-Wisp because not only does it half attack, is stays after they switch.

Toxicroak
Big Root is reasonable but give it Black Sludge like Mew says for a leftovers type recovering.

Jirachi
Splash Plate? Really?!!No, offense but you need to think of better items to use other than plates. Give it Lum berry. Water pulse and Zen headbutt is still only a 40% chance of confusion with Serene Grace. Give it wish for healing and Fire punch to give coverage.